Evaluating the Effects of Perennial Grass Filter Strips (PFS) on Eroded Carbon Fluxes in Agricultural Watersheds

dc.contributor.author Johnson, Alex
dc.contributor.department Agronomy
dc.date 2018-02-14T14:47:37.000
dc.date.accessioned 2020-07-07T05:10:19Z
dc.date.available 2020-07-07T05:10:19Z
dc.date.issued 2014-04-15
dc.description.abstract <p>Soil erosion is a serious threat to soil fertility in agricultural watersheds and makes it difficult to quantify nutrient and carbon fluxes within these systems. Currently, there is much debate on how much eroded carbon is potentially mineralizable to atmospheric CO2. To answer this, soil was sampled at 5-cm and 10-cm depths along hillslopes in six agricultural watersheds at the Neal Smith National Wildlife Refuge in Prairie City, Iowa. Watersheds with three different treatments of perennial grass filter strips (PFS) demonstrated to reduce erosion and sediment accumulation at their bases. We hypothesized that PFS also reduce potentially mineralizable carbon at the base of the watershed hillsopes. To assess this, the amount of mineralizable carbon in 60 soil samples at room temperature and 60% of water holding capacity were measured using an infrared gas analyzer. Results led to rejecting the hypothesis: potentially mineralizable carbon was greater in watershed hillslopes with PFS vs. watershed hillslopes without PFS. This indicates erosion may be sever in watersheds without PFS where eroded carbon is either rapidly transported out of the watershed or mineralized to CO2. However, results also showed that mineralizable carbon was more concentrated near the center of hillslopes for all PFS treatments.</p>
dc.identifier archive/lib.dr.iastate.edu/undergradresearch_symposium/2014/posters/6/
dc.identifier.articleid 1087
dc.identifier.contextkey 6102475
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath undergradresearch_symposium/2014/posters/6
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/91568
dc.relation.ispartofseries Symposium on Undergraduate Research and Creative Expression
dc.source.bitstream archive/lib.dr.iastate.edu/undergradresearch_symposium/2014/posters/6/Johnson.pdf|||Sat Jan 15 01:05:54 UTC 2022
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Soil Science
dc.title Evaluating the Effects of Perennial Grass Filter Strips (PFS) on Eroded Carbon Fluxes in Agricultural Watersheds
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
relation.isSeriesOfPublication 6730f354-97b8-4408-bad3-7e5c3b2fca9d
thesis.degree.discipline Environmental Science
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